Storage stable polyurethane adhesives
CA 2025525 A1 · Owner: Munzmay, Thomas · Inventors: Stepanski, Horst; Munzmay, Thomas; Meckel, Walter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Mo-3452, LeA 26,955, STORAGE STABLE POLYURETHANE ADHESIVES ABSTRACT OF THE DISCLOSURE, The present invention is directed to a predominantly linear polyurethane adhesive which can be cross-linked by heat and is at least partially crystalline at room temperature comprising:, a) a polyurethane prepolymer which contains masked isocyanate groups and is at least partially crystalline, and is prepared by reacting: a1) at least one at least partially crystalline organic polyhydroxyl compound having a molecular weight above 400, being selected from the group consisting of polyesters and polycarbonates and, a2) a polyisocyanate component consisting of at least one organic polyisocyanate having a …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed September 17, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 17, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 17, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.